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Examinationmethods



Heavy metals / metals
Elements according to the Packaging Directive 94/62 / EC (lead, cadmium, total chromium, mercury), EDQM Publication: Metals and alloys in food contact materials or metals in accordance with Annex II to Regulation (EU) No 10/2011





Damage analysis/ analysis of complaints
In many cases, it is not immediately obvious which kind of tests are necessary and reasonable for the clarification. Furthermore, test results which are available in short time are often helpful for further decisions. Our “diagnostic concept” provides the agreement of a limited budget (normally 700,- up to 1.000,- Euro) for the screening and evaluation of information already available as well as the realization and assessment of first tests according to an agreed schedule. The result is a more detailed view of the damage, possible solutions and indications for additional and reasonable investigations and researches are given. You will receive first reliable test results and an appropriate documentation of the current situation at short notice and at a fixed price. Information on the frequency of the anomalies ,point in time of recognition, technical information such as material structure, yet present test results are known to be helpful for successfully examination. If available, please send us reference samples, data sheets, specifications.





Seal strength, tensile test on strips (temperature range -40 to +120 °C)
Seal strength of machine-made sealings from pouches, sacks, packages, lidding films sealed on trays, cups etc. or sealing samples according DIN 55529 or ASTM F 88 (1 inch or 15 mm wide specimen), DIN EN 868 part 5 appendix D of medical packagings inclusive description of appearance of fracture.





Microtome section
cross section of films, moulded forms, sealed seams, etc. incl. thickness determination of visible layers with reflected or transmitted light microscope (accredited test method)





haze/ transparency
Method for quantification of the optical properties of transparent or translucent materials (not coulored or metallized). The test method describes the scattering of light caused by deterioration of a film. A low haze value characterizes a low turbidity equivalent to a good visibility of details behind or under the film lying fillings or labels. With increasing haze value the "frosted - glass- effect" increases, ie, details, eg Labels are ultimately recognizable only by direct contact with the surface. ASTM D 1003 = calibration without compensation port vs. DIN ISO 13468 = calibration with compensation port. The measured values differ slightly, but the measurements are carried out in principle on the same principle.





Oxygen transmission rate (OTR) of plastic films, laminates, coated papers, Alufoils, etc.
ISO 15105-2, ASTM D3985, ASTM F1927, DIN 53380-3;coulombmetric method (Mocon)



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